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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '424daf574df9f67a9e8831efa1ecc0e1683162928cc74486e8f7b2d758ea6671' 
  AND token = 'VppD8UDZpzD/cVqV4c6KTUJ+dysPkNpRCkWIRNsxSdY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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