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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbbba20a32efcbaceac2558929663e0d08dfc1d5f2eba0ab5e9b3a416778f11d' 
  AND token = '2AHzXcFuj7RfMv9uXrilsj9o4Sx4hJJPJvEG6zjCAg8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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