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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f1a2c1c31b21ba5e4eccec2da82ad6f88b342d7b8ca77814f77dce4dac5d65a' 
  AND token = 'TqlenucuhuvHZduTbgGGJPx4K6cHrFvN8MyDLPr/QLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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