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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e30118e139783e77ca3210dea0a78fae0144ff3681e3d36a100e7918d84d8727' 
  AND token = 'bT5SvjJPrcdQi01FMButVShajDdWadIO7SX/NDX9vaw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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