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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd741ceb9f9fb8bf084f6561e499e910092a3776f49f66c9d33f4fee6e640a87a' 
  AND token = 'uXclKREVzo9hVZi3DpXqzx6P55EbJnK0kywNJpu6h7c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}