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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4fcd664761db41ac10ad254a45d37a545c484d0351ad2879beefdae9e58a2556' 
  AND token = 'FePLfzbHyDE/x6GDVRLa1pOlInVyWnoXdv2C9E7tdkk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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