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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13082e4eab6a030ca35df82edfac255f5f0998ec27877fd335ad7c58e148f203' 
  AND token = 'yReI5LqWYPlKXVkHF/v/ZXqtVbJO9L0VaOOh58ZfVNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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