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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1c2a9020d17e7d5f508b5f7e6ec624434891d39fcd54ca045df6f31630ea298b' 
  AND token = 'x4SBnIvniLRTdLLaMjnN/AeV12OCNx6fa/fUKxEF8QY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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