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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05ead87330c951807ff519e606e7967d98b4c5a54f5d5c41662c7d597bbba9c3' 
  AND token = '127AgPxUtl7u1VHLX5HI20g+uybG+Fanqpi62ho2Hlk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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