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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e57e24d0489f26f19d9192550a14921d7055b87ad2eeb93e9711d1e49fa236fe' 
  AND token = 'Z8MIE/FzPvA3HVmbVmfpGQ1FTk8Y7Dvd4AG+F8VBXRU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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