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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c010013aaf2c7cd657fc922ed01cdc459f6e248050fa5230002defe6d4031d2c' 
  AND token = 'HJbwVAJVVOhlnclu7cJinO2UGyBZfszo/fH/7o//M9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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