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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14f6f0b664fbe6b4664c25d39de602a7116db78027723b34a147b71e86f29d46' 
  AND token = 'y4dX4457WncmNQ0O/lnmZy6OksNfb48t/W5f6imeTNw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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