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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7842454b0e57cfc7a166f06abeb4a030dfecaced714701a5ba19f6c99c6a3a7' 
  AND token = 'vrwuH/m7dknxfoAoA0OZZOMealQu8SiRmjFS9k6vCHc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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