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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bf6b2256eeed9ade115b06b41eef4e96b2d07219f22181adcb47615f88c34c9' 
  AND token = '6hyQnwm/sYEtcZAIRneR0VYx5su+XYEEuAnJAJinFJY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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