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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1445cb2d75c53e0b02460d4f771b65401d44da54b63a730a894eaa28b0d811fb' 
  AND token = 'HyTRJ7awmNBrSsf5EBYtU9O898EIdn/cf6sS4zcA7Rc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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