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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11b04570fe682f5f0c9d70a60ba195e759355a971b89095b9871a88e7881b91e' 
  AND token = 'b2Pze1hpW9FFGyLHlCfHBHEKv8S9tbjqilD6JAh7lbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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