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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '658de1c99d0182ec61be183e0fe83fe45986e3afbc321f12bc02e576c4db33c5' 
  AND token = 'xOPIYa6lH/bGpH/V5CBuGo/fcNo5TyiflUF1J3uKl6M=' 
  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"
    }
  }
}