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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '80398101a23d5e7751e84529da50b7dc0d2f5b47c3bc6f4acf3869ffb6979d25' 
  AND token = '75vuMoYKhyK/pl7iTOLrlPSD1Q2tk2ySdX6JrkpOZZY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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