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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12ae844f6be5087e49f10bd76c290f24f82f74b7eac46fd5536af908f6e6ac15' 
  AND token = 'nz3b0JEKABIQrjGDA2qydAWL2VIRo6MwW+s57G4vaFA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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