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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcf1f6fc95f39cff4719916a374e16864b184d6953bccb2ccc6288685b08b932' 
  AND token = '6nz4TtWx4ruuL3B44OO27mQ5IWc1/MJ06Hvx7RHbdJg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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