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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e99bebf2be7a62450999d58799eea92e6492c014541d3c09ed04e62d9d1005cb' 
  AND token = 'M7ZgxVZiAG3cJNNd1JajuvC948n2MTneFE13EU2pBik=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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