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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fcce43e423e484d727e5af6adde2f7dc41b1df4b65d38a432f3bd32c6481a502' 
  AND token = 'T6CeerQGhoJumO0N/wfguRqyhwse8G1MtNDOJPJMqEg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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