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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'dc0145ae143b46221e225e26e5e2742b17739c1007e654821b7e6cb3e85d07b6' 
  AND token = 'PjWvntPPrku9PpLw0MXRODztYuVSI2Prg15hB/2guY0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}