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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2ed731150b90ee742cb9ed35c61723c967d6ea033d2e1a095431f5726f6cf92a' 
  AND token = 'kNDev3Lb9gMxWGp2VbHq2KCRCCGhQ86bQSSRiMW+iRY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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