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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28aad1970655a08be44d8328f8d4c00ff7a0acc4bbbd97bdfa3dd5adfe7240ca' 
  AND token = 'W9WeeGxuS9gL+V6Sw/HFeZFEQ+XfTAXHgsfhCxT8TZo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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