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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a00695c022520e48a3a6f8bf86dab3a19327a0aef99a3edea39df1de80d55514' 
  AND token = 'NFy4J8t4jEcAaWCHr//6VEQZQJ2R2ywjPBzOJfwPbpY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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