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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dfa9b5ca9b9c526cccae758c01b0693251aa982a74ce618f075e3bae8b5dbacf' 
  AND token = 'bteE1kqD06cx5vp967KuQdM8Pler6R9NBmmjEeBFvPE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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