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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad26179cedc5bbe25c12e6d25c16e940cf3fe28694d1649acb6d564ae52f9355' 
  AND token = 'Tu0avnKL5rBDurYvtQTb66Xcr4W4k7jC4iLdlJRnvLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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