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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3cfdd41b36165235f3e34e8e6d7aa5a330483ecf32e62e90a7c37230e8ac6b71' 
  AND token = 'pF7n2C9IN6Lihun72NXBQH7j40YJECecuXrm9jFWIHo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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