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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '466534245d3cbd616c5a55676e2d064606f94ac3c7f1db976f3dabb0676b5630' 
  AND token = 'IjghiYrXyF1rK3AaxTqrpg7y75x1PLyPZ0l4VVNkatQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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