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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '861881b4838f48ba111ddcd9ad1c53ce8404b79d5467a272e5f2a5befa95200c' 
  AND token = 'hHdvf71ma5zh0bgDubHnQD/IVvmkoCHEgCL1BzD1arU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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