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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa9a0efc130559babed41ab0930b3ff8bfc1667d46acef57def0a0ae4bd53fbc' 
  AND token = 'GlGX5Gdp3Z4L5Gg0tmVoZiwjYckmSLKXpDv8I6k5o70=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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