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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2848b3d5a70ea82b191f2289a1823769a4e98eaf1725269045f40ab87117b083' 
  AND token = '2bDL8R1U6bU2Xpl9zHrBCsIkxj6ZuRgukWd6vH9MEVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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