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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aed7b2e625ba93421846aa6ea5fb5716e5fd0656e7c8bda49df0ddd32868defa' 
  AND token = '5B+Dqp5hCW3rowoy+I0SPr4LeVCjLArSrjTbCdPvtAk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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