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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a4f719a983c23bcc9acf68742ec2b68b071a1dae9fc91a57dbb9abaecfd7574' 
  AND token = 'Pv8aSAO8H92R39Dc/UxAy2HRWSKAxMEFRYSO8MYqEHI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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