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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95ae6777fcbf46afa867ef5c3fbbc89203520288b202efe9ff8fb3dd3100cf44' 
  AND token = 'Mokgzw+a8/vOkRvX52TyztfoPiSwuSOODhZnF86ORrk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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