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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '64bdd212d62b0f9fe227b0420cf165eb518d95a9f9d29536daff4d57d01c0728' 
  AND token = 'Y0gTY4fYdog50a3WWzrskLX06K7pwP7abOBg3CTvFGM=' 
  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"
    }
  }
}