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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f7f92b9d3c72750142ab7be3201a909dd97644b8bd39295725290051505d5106' 
  AND token = 'c6/cnY6zTXTzRK/niM//OryiIboY/wGssMxUdtq6Jn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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