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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4faa3025d975b6e772a5474dcc2ac82cfc8fd2ad9787bd071df36c5511dada65' 
  AND token = 'CcbQvZSsOOeAnDItgotAJo2VxsfL6r0kI2CyJ4Uo8ZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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