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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '60d7288bc93f9b8d6e6bff62069373999d4bcf75c63de1073b01a2b3b9eb19db' 
  AND token = 'ZCySdS0CYOqxMI6scpEysycZbKeHfVlUBnnFjqK1Hbo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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