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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e9612dae3e36e614a96a623cd9e41170ef44515cd4972afa340c82b7f433846d' 
  AND token = 'wuVYPOsrpPy0Nr2aJDjLdfL5+t8uK5QymNirTs/7mnw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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