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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3da283b48bf0ca86d583b57d7cf626a8ebab19a64dc107ed4fb1bc25f5d19304' 
  AND token = '3e0ELkAvL0qBWBFIA2zQslkrB3U19+vNoo2500IRaok=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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