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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5629f041366d1ea775762ff65230a11bec5c786d6dc87674127b8065c3607943' 
  AND token = '2LP2nXQz2IWch6dRbIQNxMeM4Ce6dywjWwAYTx8w8og=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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