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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e5d7353b930d3c7075d4551a6ec34a4926e441291798d26fb85ef394cfbbcab1' 
  AND token = '4wJg3/kywEqE/kXI7R3zbsFPG6XyUvT/QavAIgv4Ed8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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