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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '59a08bf8ae40118484637cd8f91279676aa8dfb09442ea999ba07308ae481189' 
  AND token = 'ptaQ6nBoDnkGDxqSJYsUzJ6fNovdsBCL0XUplZb6N10=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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