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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '103dcee3e2f5385b6f1a83cc6c0ff4bc542a38bd5f0921ea491113117ba50726' 
  AND token = 'I4VcvLtPVkOA3oUNL5quMO4lc8wNO0Dmk3q2O7PaGA0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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