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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09dd8a1bca36114453acf69bdf693de13fa1e969709621ca476337a347d69b3c' 
  AND token = 'DSqvEQtSrwKxLRJj7bpvKa8ylNTsYUIMUaNw4ohk4Cc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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