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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41110eb5570a9e68d43948b95b220b96583c141190af9b418f1e14afcf14303b' 
  AND token = 'JoQpy8ZXK2EHjn1Pj/JhvvkNa9DnPYknLIS5g0Bpy9c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00062

JSON explain

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