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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '150c65cb581ab4ed3532fb68c9d89effc189b1798679f3f9e0c5227568399fde' 
  AND token = '1CnwFwrcn5DeYHx7BRbHt2BDcagS+ErdAIeaCCiXYRY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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