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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd0d6647cc89e6dfdf2fe8bda71da2a95999a22e175e87c484233b5a248d7c3c0' 
  AND token = '6dpNQWASc1p0S/iKNnifhqvgdu8LKbH0C9A8kbsoQMA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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